Glass marking composition



Patented Jan. 4, 1944 2,838,176 GLASS MARKING COMPOSITION Werner F. Goeplert, Weehawken, N. 1., assignor tolnterch a corporation of Ohio No Drawing. Application May 13, 1941,

. Serial No. 393,183

3 Claims. (01. 10619) This invention concerns glass-marking pencils,

- and describes'a composition especially suitable for the marking of wet, dirty,-or other'diiilcultly markable suriaces.-

Mostv glass-marking pencils are essentially colored waxes, or combinations of waxes, with pisments and dyestufls. They leave good markings on dry glass, but because .01 their essentlally waxy nature, do not adhere well to wet surfaces.

I have discovered that very much improved glass marking compositions canbe prepared, which write very well even on wet glass, by incorporating into the composition from about 14% to 20% of a waxy higher fatty acid amide, containing from about 12 to 20 carbon atoms, which gives the composition the ability to stick to wet glass. Because 01' the nature of these amides, it

is necessary to include in the composition a small percentage of a resin, from about 4% to 10%, in order to get the correct glass-marking characteristics. The balance of the composition includes 15% to 25% of hard wax. 20% to 80% of soft oily or waxy material, and the balance pigment, filler, dyestui! and agents.

A typical composition comprises the following:

Percent Carnauba wax 19.3 Candelilla wax 3.4

Staybellite resin (hydrogenated rosin) 6.3 Acrawax B (octadecylic acid amide) 14.8 Copper oleate .8 Black lake 14.2 Carbon black 8.4 Methyl violet dyestui! 2.5 Victoria blue dyesmi! 3.3 Lanoline 11.8 Lard oil 15.4

The hard wax (carnauba. ouricury or other vegetable wax of similar hardness) is used tor its physicalproperties, and because of the excellent solvent action these waxes -haveonthedyestui!sused. Thewaxmayb'ea emical Corporation, New York, N. 1.,

about 4% to 10% of the composition. The hydrogenated rosin may be replaced by other resins compatible wlth'the amide-e. g., by ordinary rosin, etc.but I prefer this particular resin because it retains its properties on prolonged storage and exposure to the air.

- The acid amide may be any oi those prepared from non-drying fatty acids having irom'j 14 to 20 carbon atomsit should comprise from about 12% to 20% of the compgsition. The copper oleate is used as a dispersing agent ior'pigment and dyestufl. The various pigments, and dyes may be varied at will, to give the desired color; but the dyestuii should be soluble in the waxy vehicle for maximum stren h;

The lanoline and .lard oil may be replaced by' other greases and oily diluents. Petrolatum,

mineral oil, and similar-greasy and' oily softencandelilla, reed,

single hard vegetable wan-or a mixture, and may comprise from 15% to 25% o! the composition. I

Thehydrogenatedrosinisnsedmconlimctlon' with the. acid; amide, to produce the desirable ltmay'compiiseirom ersmay be used. These combined soitening agents should be 20% to 28% of the composition, using somewhat more oil than grease.

I claim:

- l, A glass-marking pencil consisting of from v 14% to 20% 01 an amide of a non-drying fatty acid having iro'm 12 to 20 carbon atoms, from 4% to of a resin compatible therewith, from v 15% to 25% of a hard vegetable wax, from to 28% of a softener mixture comprising a major proportion of 01101 the class consisting '0! mineral oil'and lard oil, and a minor proportion oi agrease or the class consisting of petrolatum and lanoline, and the balance pigment, dyestufl, filler and oil-soluble dispersing agent.

'2. A glass-marking pencil consisting of from 14% to 20% of octa-decylic acid amide, 4% to 10% hydrogenated ros'in,'l5% to of a hard vegetable wax, 20% to 28% of a soitener mixture comprising a major proportion of oil of the class consisting of mineral oil and lard oilranda minor proportion of a grease of the class consisting of petrolatum and lanoline, and the balance/pigment, iiller, dyestufl and oil-soluble dispersing went.

3. A glass-marking pencil consisting of about 20% of carnauba wax, about 8% hydrogenated rosin, about 15% octa-decylic acid amide, about 12% lanoline, about 15% lard oil, and the balance principally coloring, oil-soluble dispersing and filling agents.

. F. GOEPI 'ERT. 

